Improvement in ore-stamp feeders



I.' D CU SENJBARY 8L l. A. MARS.

Gre-Stamp Feeders.

' Patented )lune 24,11873.l

NO 140,250.4 l

J' A A Eff. j N! A i 0 i d Y HV1 I J C) a I l B l M fu /f Y Z 4 gf/fW/f"Wiws am j www MW /@WW f V v JAMES D. CSENBABY AND JAMES MARS, OF SANFRANClSCO, CAL.

lWIPROl/EWIENT lh! ORE-'STAMP FEEDERS.

Specification forming part of Letters Patent No. lllldd, dated June 2-1,1873; application filed April 2l, 1573.

To all uhom it may concern:

Be it known that we, JAMES D. CUSENBA- RY and JAMES A. MARS, of the cityand county of San Francisco, State of California, have invented certainnew and useful Improvements in Ore- Feeders for Quartz-Mills; and we dohereby declare the following description and accompanying drawings aresuiiicient to enable any person skilled in the art or science to whichit most nearly appertains, to make and use my said. invention orimprovements without further invention or experiment. Y

Our invention relates to improvements in that class'of ore-feeders forquartz-mills in which a pawl and ratchet are employed to operate thefeeder automatically by the drop of the stamp. Our improvements consist,first, in mounting a feed-cylinder upon a movable frame or truck, sothat it can be readily shifted from place to place when it is desired torepair the mill, and lastly, of an improved arrangement for operatingthe pawl-rod by the drop of the sta-mp without the use of springs. v

' In order to more fully illustrate and explain our invention, referenceis had to the accompanying drawings forming a part of thisspecifcation,in which- Figure lis a vertical section. Fig. 2 is a back view. Fig. 3is a transverse section.

A' represents the frame of astamp-mill. B is the stamp. C is lthestamp-stem with its tappet D. F is the cam-shaft, and G the cam whichlifts the stamp, all of `which are arranged in the ordinary manner ofconstructing a stamp-battery. H H are the foundationtimbers upon whichthe feeding-cylinder I is mounted. These timbers are mounted uponrollers so that the cylinder and frame can be moved about, as desired.The cylinder I is made of cast metal, and has its outer surface formedinto chambers or depressions J J, ,which are separated from each otherby longitudinal partitions 7c. The cylinder and its carriage, when inworking position, are placed below the hopper L, so that the ore fromthe hopper will fall into the chambers, and, as the cylinder' revolves,be carried around until it fallls by its own weight from the chambersupon an inclined apron, M, which directs it beneath the stamp.

This feeding-cylinder, being made of cast metal, will 'not wear out likethe-endless belts heretofore used in this class of machines, and as itturns upon journals like any common. roller or cylinder, it cannotbecome clogged, as the endless belt is liable to do. To one end of thecylinder a ratchet-wheel, N, is secured, and thisratchet-wheel isoperated by a'pawl-bar, C,-to revolve the cylinder.

In order to operate the pawl-bar from the tappet a horizontal shaft, p,has its opposite ends supported in boxes which are secured to the sidesof the upright timbers of the frame,

so that the shaft will pass across directly in front of the tappettransversely to the movement of the stamp-stem.

A fixed arm, g, extends backward from the shaft p, so that its extremitywill terminate below the tappet in position to receive a blow from itwhen the stamp falls. Another fixed arm, r, extends forward from theshaft directly over the ratchet-wheel, and to the extremity of this armthe upper end of the pawl-bar o is attached by means of atrunnion-block, t. This bar extends down to the middle of the peripheryof the ratchet-wheel, and has one or more upward-projecting teeth on itslower end', which serve to engage with the teeth of the ratchet when thepawl is lifted by the rock-shaft, and thus rotate the feedingcylinder.

It will, therefore, be' evident that at each drop of the stamp thetappet will strike the arm q and carry it downward, thus giving theshaft p a rocking motion, the weight of the pawl and its arm r serving,-to rotate the shaft in an opposite direction, thus feeding the oreautomatically when it is needed.

When there is a sufiieient quality of ore beneath the stamp the dropwill not be sufficient to operate the cylinder; but whenthe quantity o fore beneath the'stamp is reduced the drop is lgreater, and consequentlythe tappet strikes the arm q and operates the cylinder.

Having thus described our invention, what we claim, and desire to secureby Letters Patf It witness whereof we have hereunto` set ent, isourhands and seals..`

1. The feeding-cylinder .I mounted upon the f movable timbers H H,substantialiy'as and for the purpose above described. A Y

2. The rock-shaft p with its Xed-arms q rl; Y in combination with thepaWLbaro,ratchet;A .'Witnesses:` wheel N, and feeding-cylinder I,1whenar- J. L. BOQNE, ranged to be operated by the tappet D, snb- G. M.RICHARDSON. stantially as Iamd for the purpose described.

JAMES D. CUSENBARY." [L. S. JAMES A. MARS. [L S.

